Thanks so much for your help. So I would just copy and paste this function code into my functions.php file (make a copy and place it in my child theme folder) and that's it? Or do I have to add something somewhere else as well? I don't know what you mean by "add it to the wp_head hook". There is no wp_head hook in the functions.php file...

Hmmm, when I copy the functions.php file to my child theme folder, my site goes blank. Do I make a completely new functions.php file with only the code above in it? Would I leave the other fuctions.php file in the thematic folder?

I'm trying to resolve an issue in IE9 where the slider will only work after a refresh of the page. This code was actually on the premium slider version page (http://www.premiumslider.matthewruddy.com/) but I'm assuming it will work on this version just the same since it is only a browser hack of sorts.

OK... first the code is untested, in terms of doing what you want, but it will not break your theme. If your site has gone blank I presume you cannot access the dashboard?

You will need to download the childtheme functions.php and edit and then upload again.

Sorry if I am asking the basics, but
1) you have a child theme you activated... assuming yes. You do not change any thematic files only the ones in your child theme.
2) There you have a style.css and a functions.php
3)Enter the code on a new line after what is probably the last current line there
// define('THEMATIC_COMPATIBLE_FEEDLINKS', true);
So... function add_browser_test(){
through to
add_action('wp_head','add_browser_test');

That code will not break your theme - make sure you have the code as is above.

If however you can access your dashboard and the site is blank then there is a conflict elsewhere.

Yes, the site went blank after copying the functions.php file to my child theme directory, but I deleted it and everything is back to normal. I'm curious as to why the site went blank after just copying this file to my child theme directory...any ideas?

I have a bunch more code after // define('THEMATIC_COMPATIBLE_FEEDLINKS', true); in the functions.php file that is within the thematic directory.

I'm having problems with compability using the Thematic and Photo Lover themes. I'm not trying to add the add_browser_test to my functions.php but it doesn't help.

I changed the code to add a third argument '1' to place the code first in the <head> tag, as I know this has helped before, but this doesn't place the code first after the <head> tag, only a bit higher up than it did without the argument...

I really need to fix this in my project. Is there no plans to fix this in the themes? Or could you assist in how I can add the code where I want it?